TY - JOUR
T1 - A Fully Non-fused Ring Acceptor with Planar Backbone and Near-IR Absorption for High Performance Polymer Solar Cells
AU - Chen, Ya Nan
AU - Li, Miao
AU - Wang, Yunzhi
AU - Wang, Jing
AU - Zhang, Ming
AU - Zhou, Yuanyuan
AU - Yang, Jianming
AU - Liu, Yahui
AU - Liu, Feng
AU - Tang, Zheng
AU - Bao, Qinye
AU - Bo, Zhishan
N1 - Publisher Copyright:
© 2020 Wiley-VCH GmbH
PY - 2020/12/7
Y1 - 2020/12/7
N2 - Fused-ring electron acceptors have made significant progress in recent years, while the development of fully non-fused ring acceptors has been unsatisfactory. Here, two fully non-fused ring acceptors, o-4TBC-2F and m-4TBC-2F, were designed and synthesized. By regulating the location of the hexyloxy chains, o-4TBC-2F formed planar backbones, while m-4TBC-2F displayed a twisted backbone. Additionally, the o-4TBC-2F film showed a markedly red-shifted absorption after thermal annealing, which indicated the formation of J-aggregates. For fabrication of organic solar cells (OSCs), PBDB-T was used as a donor and blended with the two acceptors. The o-4TBC-2F-based blend films displayed higher charge mobilities, lower energy loss and a higher power conversion efficiency (PCE). The optimized devices based on o-4TBC-2F gave a PCE of 10.26 %, which was much higher than those based on m-4TBC-2F at 2.63 %, and it is one of the highest reported PCE values for fully non-fused ring electron acceptors.
AB - Fused-ring electron acceptors have made significant progress in recent years, while the development of fully non-fused ring acceptors has been unsatisfactory. Here, two fully non-fused ring acceptors, o-4TBC-2F and m-4TBC-2F, were designed and synthesized. By regulating the location of the hexyloxy chains, o-4TBC-2F formed planar backbones, while m-4TBC-2F displayed a twisted backbone. Additionally, the o-4TBC-2F film showed a markedly red-shifted absorption after thermal annealing, which indicated the formation of J-aggregates. For fabrication of organic solar cells (OSCs), PBDB-T was used as a donor and blended with the two acceptors. The o-4TBC-2F-based blend films displayed higher charge mobilities, lower energy loss and a higher power conversion efficiency (PCE). The optimized devices based on o-4TBC-2F gave a PCE of 10.26 %, which was much higher than those based on m-4TBC-2F at 2.63 %, and it is one of the highest reported PCE values for fully non-fused ring electron acceptors.
KW - J-aggregation
KW - electron acceptors
KW - fully nonfused acceptors
KW - organic solar cells
UR - https://www.scopus.com/pages/publications/85092092739
U2 - 10.1002/anie.202010856
DO - 10.1002/anie.202010856
M3 - 文章
C2 - 32866327
AN - SCOPUS:85092092739
SN - 1433-7851
VL - 59
SP - 22714
EP - 22720
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 50
ER -